Add a shadow quality setting for scene lights

[Fortune117]

For?

S&Box

What can't you do?

Right now lights in the scene have very few options that can be changed. On maps with many lights, turning on shadows at all can incur a huge performance cost. I am currently working on randomly generated levels which include lights in the rooms being generated and shadows are by far the biggest performance hit.

How would you like it to work?

Some settings to tweak the quality of shadows cast by light sources would be nice, godot has a tonne of settings that are user accessible: https://docs.godotengine.org/en/stable/tutorials/3d/lights_and_shadows.html

It'd be nice to get some similar options.

What have you tried?

Disabling shadows is the only real option right now.

Additional context

No response